The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2002
Filed:
Jun. 12, 2000
Allen R. Boyce, Portland, OR (US);
Matthew J. Brinkman, Brush Prairie, WA (US);
SEH America, Inc., Vancouver, WA (US);
Abstract
An illumination apparatus for indicating the liquid level in a chemical storage tank is provided. The apparatus includes a transparent globe surrounding a light bulb mounted by flanges to upper portions of a storage tank, and being illuminated by an external electrical supply. Optionally the light bulb may be cooled by either allowing gas or air contained in the storage tank pass through a hole in the globe to interact with and cool the light bulb, or supplying a gas to the globe and circulating it around the light bulb. A shadow line is cast at the surface level of the liquid in the tank, and can be visibly seen through the translucent walls of the tank from some distance away.